Having mail problem very slow opening, deleting, unable to move to folders

Thank you so much Matt, for your reply. I visited the articles you listed. I couldn't find anything on the first one, How to troubleshoot, but I know what is the problem. The Mail program is corrupted somehow. The second one was helpful to how to reinstall the software, but I worry that all my files in the many folders I have could be lost! That scares the bejeezus out of me as I am an academic researcher and need the files! I have the original system software CD and can do as the article advises but are you able to tell me if what I fear is unfounded? Thanks again. It was really good of you to respond.

MichelPM, you are very generous with a reply. I am unable to address your questions at the moment, too many errands and things to do but I will sit later this evening and go over each and every one of your questions. I do use my computer for lots of data collection and retrieval for use, as I said I am an academic (we have to publish or perish!). So until later, grazie!

MichelPM, I don’t know how to find out how full is my Mail app. I confess to being mostly an ignoramus about computer hardware, software, applications storage and usage. I know where to look for some stuff, but I don’t know what all the information means. I found the page under About this Mac Serial-ATA that gives the following info: Macintosh HD:

Capacity: 319.73 GB (319,728,959,488 bytes)

Available: 270 GB (270,003,339,264 bytes)

Then under Memory Slot there are two banks in Bank 0 all categories are empty but Bank 1 says

Size: 1 GB

Type: DDR2 SDRAM

Speed: 667 MHz

Status: OK

I usually have three browsers open and one to two wordprocessers (Word and TextEdit), the resident Dictionary. When needed but closed when done with the current activity are Preview, Adobe Reader. I do have a lot of documents on the desktop and filed in folders are uncountable. I could commit most of these to flashdrives if I have to, but I’m not sure how to save all the stuff I have in folders in the Mail app. I do not run any antivirus or “crapware” software that I can find in the MacHD applications folder. I’ve never downloaded such programs. I will commence to copy to external drives data I wish to preserve. Can I copy the entire mail set of archive folders to an external hard drive? I have a La Cie.

With much appreciation for any help you offer,

MMarvelous

Thank you, MichelPM, for your attention to my problem. Apology for the delay in responding, but I work and then had to deal with other life problems. Okay, I found the Mac model number identifier, it is iMac4,1. The 1GB RAM is what came with the computer when purchased. Yes, I have had the habit of keeping lots of files and folders on the desktop. I have been trying to consolidate by topic into files and will continue to do that, also copying stuff to flashdrives and deleting the files from the desktop but that will take some time and I'm squeezing my life into my life these days what with semester starting up again (I teach). Yeah, I realize life is tough for eveyrone or nearly everyone. I so much appreciate your help. And yes, I have started to "thin" out the mail folders. I'm too embarassed to talk about those and how many are there, so when I started looking I was shocked so I started right away to dump. I admit to mindlessly just saving things and it has been years. I know this computer is at least from 2007 since I've found email correspondence with friends that old! Yikes! I don't really need to keep all this stuff but I do have to be selective, which, again, takes time. So I will busy myself with all this mowing z'lawn. I have already emptied trash and junkmail and sent mail, keepnig these folders as empty daily, and filing inbox mail by filing some in archival folders or dumping them. I keep the OS X Trash emptied also. I will proceed to do my duty as instructed and look to future correspondence. I will notify through this discussion my progress. I probably need to buy some RAM, right? I'll start saving up for it. So to have a startingpoint: there is 269.93 GB available, and the desktop is indicating there are 58 items on it (some of which have many many documents in folders)

Thanks again